riscv: Move .rela.dyn outside of init to avoid empty relocations

This is a preparatory patch for relocatable kernels: .rela.dyn should be
in .init but doing so actually produces empty relocations, so this should
be a temporary commit until we find a solution.

This issue was reported here [1].

[1] https://lore.kernel.org/all/[e-mail]/.

Signed-off-by: Alexandre Ghiti <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Palmer Dabbelt <[e-mail]>

arch/riscv/kernel/vmlinux.lds.S

···
 		*(.rel.dyn*)
 	}
 
-	.rela.dyn : {
-		*(.rela*)
-	}
-
 	__init_data_end = .;
 
 	. = ALIGN(8);
···
 	.sdata : {
 		__global_pointer$ = . + 0x800;
 		*(.sdata*)
+	}
+
+	.rela.dyn : {
+		*(.rela*)
 	}
 
 #ifdef CONFIG_EFI